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http://dx.doi.org/10.3746/jkfn.2005.34.6.784

Effect of Hot Water Extracts of Roasted Rhus vemiciflua Stokes on Antioxidant Activity and Cytotoxicity  

Kwak, Eun-Jung (Food Function Research Division, Korea Food Research Institute)
Jo, Il-Jin (Food Function Research Division, Korea Food Research Institute)
Sung, Ki-Seung (Food Function Research Division, Korea Food Research Institute)
Ha, Tae-Youl (Food Function Research Division, Korea Food Research Institute)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.34, no.6, 2005 , pp. 784-789 More about this Journal
Abstract
The inhibitory effects of hot water extracts of Rhus verniciflua Stokes pith and peel roasted at 170, 200 and $220^{\circ}C$ on lipid peroxidation, formation of DPPH free radicals and growth of four human cancer cells such as HepG2 (liver cancer), SNU-1 (stomach cancer), MCF-7 (breast cancer) and Widr (colon cancer) were examined. The antioxidant activities and growth inhibitory effects on cancer cells of hot water extracts of peel were higher than those of pith, and the activities were dose-dependent. The roasting temperature showing the highest antioxidant activities and growth inhibitory effects on cancer cells was in the range of $170\~200^{\circ}C$ The lipid peroxidation and formation of DPPH free radicals of hot water extracts of roasted pith and peel were inhibited to 50.9, $56.5\%\;and\;79.0,\;78.4\%$ at the concentration of $500\mu g/mL$, respectively. The growth inhibitory effects of roasted pith and peel on cancer cells were in the order of Widr (41.5, $36.0\%$) > HepG2 (61.5, $44.0\%$) > MCF-7 (92.0, $69.2\%$)> SNU-1 (100, $100\%$) cells at the concentration of $1,000\mu g/mL$ as compared with the control, respectively. These results suggest that roasted Rhus verniciflua Stokes could be an useful natural medicinal plant for colon cancer.
Keywords
Rhus verniciflua Stokes; antioxidant activity; cytotoxicity; colon cancer;
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